String format blocking

Oct 28, 2018 5:35:41 AM io.vertx.core.impl.BlockedThreadChecker
WARNING: Thread Thread[vert.x-eventloop-thread-2,5,main] has been blocked for 6103 ms, time limit is 2000
io.vertx.core.VertxException: Thread blocked
	at java.util.regex.Pattern$Start.match(Pattern.java:3463)
	at java.util.regex.Matcher.search(Matcher.java:1248)
	at java.util.regex.Matcher.find(Matcher.java:664)
	at java.util.Formatter.parse(Formatter.java:2549)
	at java.util.Formatter.format(Formatter.java:2501)
	at java.util.Formatter.format(Formatter.java:2455)
	at java.lang.String.format(String.java:2940)
	at com.mewna.catnip.shard.CatnipShard.websocketMessagePollAddress(CatnipShard.java:490)
	at com.mewna.catnip.shard.CatnipShard.lambda$null$2(CatnipShard.java:152)
	at com.mewna.catnip.shard.CatnipShard$$Lambda$30/658391743.handle(Unknown Source)
	at io.vertx.core.impl.VertxImpl$InternalTimerHandler.handle(VertxImpl.java:885)
	at io.vertx.core.impl.VertxImpl$InternalTimerHandler.handle(VertxImpl.java:844)
	at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:339)
	at io.vertx.core.impl.ContextImpl$$Lambda$16/1699113578.run(Unknown Source)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:748)